<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <el-row>
        <el-col
          ><el-button type="primary" @click="addCateShow">添加分类</el-button>
        </el-col>
      </el-row>
      <!-- 数据表格区域 -->
      <tree-table
        :data="catelist"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        border
        show-index
        index-text="#"
        :show-row-hover="false"
        class="treeTable"
      >
        <template slot="isUse" slot-scope="scope">
          <i
            class="el-icon-circle-check"
            v-if="scope.row.cat_deleted === false"
            style="color: green;"
          ></i>
          <i class="el-icon-circle-close" v-else style="color: red;"></i>
        </template>

        <template slot="order" slot-scope="scope">
          <el-tag v-if="scope.row.cat_level === 0" size="mini">一级</el-tag>
          <el-tag
            type="success"
            v-else-if="scope.row.cat_level === 1"
            size="mini"
            >二级</el-tag
          >
          <el-tag type="warning" v-else size="mini">三级</el-tag>
        </template>

        <template slot="edit" slot-scope="scope">
          <el-button type="primary" size="mini">编辑</el-button>
          <el-button type="danger" size="mini">删除</el-button>
        </template>
      </tree-table>
      <!-- 分页功能 -->
      <div class="block">
        <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="queryInfo.pagenum"
          :page-sizes="[3, 5, 10, 15]"
          :page-size="queryInfo.pagesize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total"
        >
        </el-pagination>
      </div>
    </el-card>

    <!-- 添加分类对话框 -->
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisable"
      width="50%"
      @close="addCateDialogClose"
      ><el-form
        :model="addCateForm"
        :rules="addCateFormRules"
        ref="addCateFormRef"
        label-width="100px"
      >
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类">
          <!-- 级联选择器 -->
          <div class="block">
            <el-cascader
              v-model="selectedKeys"
              :options="paretCateList"
              :props="cascaderProps"
              @change="cascaderChange"
              clearable
            ></el-cascader>
          </div>
        </el-form-item>
      </el-form>
      <span slot="footer">
        <el-button @click="addCateDialogVisable = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      catelist: [],
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      total: 0,
      columns: [
        {
          label: '分类名称',
          prop: 'cat_name'
        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isUse'
        },
        {
          label: '排序',
          type: 'template',
          template: 'order'
        },
        {
          label: '操作',
          type: 'template',
          template: 'edit'
        }
      ],
      addCateDialogVisable: false,
      addCateForm: {
        cat_name: '',
        cat_pid: 0,
        cat_level: 0
      },
      addCateFormRules: {
        cat_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' }
        ]
      },
      paretCateList: [],
      cascaderProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      selectedKeys: []
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: this.queryInfo
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品列表失败')
      }
      this.catelist = res.data.result
      this.total = res.data.total
      console.log(res)
    },
    handleSizeChange(newpage) {
      this.queryInfo.pagesize = newpage
      this.getCateList()
    },
    handleCurrentChange(newpage) {
      this.queryInfo.pagenum = newpage
      this.getCateList()
    },
    addCateShow() {
      this.getParentCateList()
      this.addCateDialogVisable = true
    },
    async getParentCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: {
          type: 2
        }
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取父级分类列表失败')
      }
      this.paretCateList = res.data
      console.log(res.data)
    },
    cascaderChange() {
      console.log(this.selectedKeys)
      if (this.selectedKeys > 0) {
        this.addCateForm.cat_pid = this.selectedKeys[
          this.selectedKeys.length - 1
        ]
        this.addCateForm.cat_level = this.selectedKeys.length
        return
      } else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
    addCate() {
      this.$refs.addCateFormRef.validate(async validate => {
        if (!validate) return
        const { data: res } = await this.$http.post(
          'categories',
          this.addCateForm
        )
        if (res.meta.status !== 201) {
          return this.$message.error('添加分类失败')
        }
        this.$message.success('添加商品分类成功')
        this.getCateList()
        this.addCateDialogVisable = false
      })
    },
    addCateDialogClose() {
      this.$refs.addCateFormRef.resetFields()
      this.selectedKeys = []
      this.addCateForm.cat_pid = 0
      this.addCateForm.cat_level = 0
    }
  }
}
</script>

<style lang="less" scope>
.treeTable {
  margin-top: 15px;
}
.el-cascader {
  width: 100%;
}
</style>
